trucks



(No Model.) 2 Sheets-Sheet l.

B. H. TRUCKS. OSOILLATING PISTON ENGINE.

No. 552,798. Patented Jan. 7, 1896.

WITNESSES I (No Model.) Sheets-Sheet 2. B. H. TRUCKS. OSGILLATING PISTONENGINE.

Patent ed Jan.

WITNESSES w m d ANDREW BJSRANAM. FHUIOUTKQWISHINGTUN, DE.

NITED STATES AT FFICE BENJAMIN I-I. TRUCKS, OF GALDKVELL, KANSAS,ASSIGNOR OF ONE-HALF TO \VILLIAM G. \VILLIAMS, OF MINCO, INDIANTERRITORY.

OSClLLATlNG-PISTON ENGINE.

SPECIFICATION formingpart of Letters Patent No. 552,798, dated January7, 1896.

Application filed October 24, 1895. Serial No. 566,738- (Ifl'o model.)

To ctZZ whom it may concern.-

Be it known that I, BENJAMIN II. TRUCKS, a citizen of the United Statesof America, residing at Caldwell, in the county of Summer and State ofKansas, have invented certainnew and useful Improvements in OscillatingPiston Engines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form a part of this specification.

This invention relates to improvements in oscillating-piston engines;and it consists in the construction and combination of the parts, aswill be hereinafter fully set forth, and particularly pointed out in theclaims.

In the accompanying drawings, forming part of this specification, Figure1 is a side elevation of an oscillating-piston engine constructed inaccordance with my invention. Fig. 2 is a plan view. Fig. 3 is a sideelevation of the cylinder with the cylinder-head removed. Fig. 4 is aside elevation of the steamchest with the covering-plate removed. Fig. 5is a sectional view on the line 5 5 of Fig. 4, the covering-plate beingin position. Fig. 6 is a sectional View on the line 6 6 of Fig. 4. Fig.7 is a sectional view of the steam-chest, showing the inlet and outletports; and Fig. 8 is a detail perspective view of the oscillating barcarrying the slide-valves which operate in the steam-chest.

A designates the frame of the engine, the side pieces of which are ofsimilar construction and of sufficient strength to support the cylinderat one end and a heavy fly-wheel at the other. The side pieces of theframe A are connected to each other at one end by a transverse shaft A',upon which the fly-wheel B is mounted, and at the other end by plates aa, above which the cylinder (J of the engine is placed, the side piecesbeing cut away, as shown, to receive the cylinder. The fly-wheel ismounted upon the shaft A between the side pieces of the frame, and theshaft is journaled in bearings Z) bolted to the upper edges of the sidepieces. The shaft is provided at one end with a wrist-wheel B and at theother with an eccentric B which are connected to different parts of theengine, as hereinafter described.

The cylinder 0 is provided at one end with a plain head C, through thecenter of which passes the shaft of the oscillating piston, the otherend of the cylinder being provided with a head 0 having on its innerside a central recess c for the end of the shaft of the oscillatingpiston. The cylinder-head C is provided at opposite points with steaminlet and outlet ports 61 and cl, and between these ports and within thesteam-chest the head is provided with steam outlet or exhaust channels61 which communicate with an exhaust-pipe 61 extending through thesteam-chest. The cylinderhead C is also provided within the steam-chestwith a central stud-bearing 0, upon which is I mounted a stub-shaft Ehaving a socket which fits oversaid stud-bearing. The stub-shaft isprovided at its inner end with an annular flange e and adjacent to saidflange with a squared portion 6- beyond which it is rounded, the outerend being squared to receive an operating-arm. Over the squared portion6 of the stub-shaft E fits abar F carrying valves f at its outer endswhich slide over the ports (I, d and d when the bar is oscillated, ashereinafter described.

The rounded portion of the stub-shaft bears in a central aperture in thecovering-p1ate O of the steam-chest. To the outer end of the stub-shaftE is attached an arm E, which is connected to the eccentric B on thedriven shaft A by a connecting rod or pitman E and by this connectionthe bar F will be oscillated from the driven shaft to operate theslide-valves f to admit steam through the ports to first one side of thepiston and then the other, the exhaust-steam passing through theopposite ports to the channels (1 by way of the recesses f in theslide-valves.

G designates a pitman-rod which is connected at onee-nd to thewrist-Wheel B and at the other to an arm G attached to the outer end ofthe shaft of the reciprocating piston H located within the cylinder. Thereciproeating piston is provided at its ends with the usual packingswhich bear against the inner side of the cylinder. Partitions K K arelocated in the cylinder oneach side of the reciprocating piston, theinner ends of the partitions having packings which bear against theshaft. The ports d and (1 open into the cylinder on opposite sides ofthe partitions K. The steam-supply pipe I enters the steamchest throughthe covering-plate G I am aware that prior to my invention steamengineshave been constructed with cylinders divided into two compartments inwhich an oscillating piston works; also, that it is not new to providean oscillating-piston engine with valve mechanism driven from the shaftupon which the fly-wheel is mounted, and I do not therefore claim suchconstruction broadly. The device hereinbefore described provides a cheapand efficient means of connection, and the parts are readily accessiblefor repairs, renewing packings, &c.

WVhat I claim as my invention, and desire to secure by Letters Patent,is

1. The combination in a steam-engine having a cylinder with anoscillating-piston the shaft of which extends through one of thecylinder-heads, the other cylinder-head having a central bearing for theshaft and inlet and outlet ports, a stud-bearing 0 formed on thecylinder -head and projecting into the steam-chest, a stub-shaft Ebearing at one end upon the stud-bearing and projecting through theeovering-plate of the steam-chest, a pitman connected to a driven shaftand to an arm on the outer end of the stub-shaft, and a bar F mounted onthe stub-shaft and provided with valves at its ends which slide over theports in the cylinder-head, substantially as shown and for the purposeset forth.

2. The combination in an oscillating-piston steam-engine, of a frameAconsisting of side pieces connected by plates at a and a transverseshatt A, a fly-wheel mounted on the shaft between the side pieces of theframe, a wrist-wheel on one end of the shaft and an cecentric on theother end; together with a cylinder mounted upon the side pieces of theframe and having an oscillating-piston the shaft of which is connectedto the wrist-wheel by a pitman, and valve operating mechanism consistingof a valve carrying bar mounted on a stub-shaft which is connected tothe eccentric by a pitman, the parts being organized substantially asshown and described.

3. In a steam-engine, the combination, of an oscillating piston, acylinder having heads one of which is centrally apertured for thepassage of the shaft of the oscillating piston and the other head havinga recess to form a bearing for the other end of the shaft and portswhich open into the cylinder and communicate with the steam-chest, and avalve carrying bar mounted 011 a stub-shaft which is rocked from adriven part of the engine, the cylinder-head having exhaust passageswhich lead from between the ports to the exhaust pipe.

4. In combination with a steam-engine having an oscillating piston andinlet and outlet ports, of a cylinder-head having a stub-shaft mountedindependent of the oscillating piston, a bar F mounted on the stub-shaftand provided with valves f at its ends, an arm attached to the outer endof the stub-shaft and connected to an eccentric carried by thedriven-shaft, substantially as shown and for the purpose set forth.

5. In combination with a steam-en gine having a cylinder with anoscillating piston therein connected to the shaft of the fly-wheel, oneof the heads of the cylinder having inlet and outlet ports d and d,exhaust passages d and a stud-bearing c, of a stub-shaft E having asocket which fits over the stud-bearing, an annular flange at its innerend and a squared portion adjoining the flange, a bar F mounted on thesquared portion of the stubshaft and carrying slide valves at its outerends which operate over the ports in the cylinder-head, an arm Econnected to the outer end of the stub-shaft, and a pitman E connectingthe arm to an eccentric on the shaft of the fly-wheel, the parts beingorganized substantially as shown and for the purpose set forth.

6. In a steam-engine constructed substantially as shown, thecombination, of a cylinder-head having inlet and outlet ports, exhaustpassages communicating with the exhaust pipe and' a central stud-bearingc; a stub-shaft E having a socket which fits over the stud-bearing, saidshaft also having an annular flange at its inner end and a squaredportion adjoining said flange, the outer end of the stub-shaftprojecting through the covering-plate of the steam chest and having anarm attached thereto which is connected to the driven shaft of theengine by a pitman; together with a bar F mounted on the squared portionof the stub-shaft and provided at its outer ends with slide-valves fwhich operate over the ports and exhaust channels, the parts beingorganized substantially as shown and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

BENJAMIN II. TRUCKS.

\Vitnesses:

I. M. HORTON, 'l. H. WICKEY.

